32吨矿用自卸车动态换挡策略研究
发布时间：2019-05-16 09:14
【摘要】：重型矿用自卸车是一类用于矿山短途运输的非公路车辆,其工作环境恶劣,承载质量大且空、满载交替变换。在重型矿用自卸车上采用自动变速技术可减轻驾驶员劳动强度、提高车辆工作效率。目前在该类车上采用的换挡策略多数都是引用非专用车自动变速理论,并未考虑矿用自卸车特殊的工作环境,由此制定的换挡策略不免出现动力不足或循环换挡等问题。本文针对矿用自卸车使用环境和工作特点,在非专用车辆两参数自动换挡策略的基础上,引入了一个新的参数——车辆负荷系数来综合表征车辆载荷和道路状况,最终提出了以“车速、油门开度、车辆负荷系数”为控制参数的三参数动态自动换挡策略。本文以32吨矿用自卸车为研究对象,首先建立了包括发动机、液力变矩器等部分的车辆传动系统的数学模型,重点研究了发动机与液力变矩器的共同工作情况,求解了二者共同工作的输出特性。然后,通过解析法和图解法对最佳换档车速进行了求解,并最终得到了动力性动态换挡策略的换挡曲线。在MATLAB/SIMULINK仿真环境下建立了整个车辆传动系统的仿真模型,针对本文制定的换挡策略进行了多工况复合仿真试验。试验结果表明,本文制定的换挡策略可适应车辆运行的恶劣环境和多种复杂工况,能保证车辆在各种工况下的动力性,并可减少车辆自动挡位模式的设置。在某工厂提供的设备环境下搭建了试验平台并进行了试验,提出了针对本文自动换挡试验的试验台改进方案,并设计了试验控制软件和自动换挡的程序。
[Abstract]:Heavy mine dump truck is a kind of non-road vehicle used in mine short distance transportation. Its working environment is bad, the bearing quality is large and empty, and the full load is alternately changed. The automatic transmission technology in heavy mine dump truck can reduce the labor intensity of drivers and improve the working efficiency of vehicles. At present, most of the shift strategies used in this kind of vehicles are based on the theory of automatic transmission of non-special vehicles, and the special working environment of mine dump trucks is not taken into account. The shift strategy therefore has some problems, such as insufficient power or cyclic shift, and so on. In this paper, according to the working environment and working characteristics of mining dump truck, a new parameter, vehicle load coefficient, is introduced to comprehensively characterize the vehicle load and road condition on the basis of the two-parameter automatic shift strategy of non-special vehicle. Finally, a three-parameter dynamic automatic shift strategy based on "speed, throttle opening and vehicle load coefficient" is proposed. In this paper, the 32 ton mine dump truck is taken as the research object. Firstly, the mathematical model of the vehicle transmission system, including the engine, the hydraulic torque converter and so on, is established, and the common work of the engine and the hydraulic torque converter is studied. The output characteristics of the two working together are solved. Then, the optimal shift speed is solved by analytical method and graphic method, and the shift curve of dynamic shift strategy is finally obtained. The simulation model of the whole vehicle transmission system is established in MATLAB/SIMULINK simulation environment, and the multi-working condition compound simulation test is carried out according to the shift strategy developed in this paper. The test results show that the shift strategy formulated in this paper can adapt to the bad environment of the vehicle and a variety of complex working conditions, can ensure the dynamic performance of the vehicle under various working conditions, and can reduce the setting of the automatic blocking mode of the vehicle. The test platform is built and tested in the equipment environment provided by a factory, and the improvement scheme of the test-bed for the automatic shift test is put forward, and the test control software and the automatic shift program are designed.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD562.1
本文编号：2478177
[Abstract]:Heavy mine dump truck is a kind of non-road vehicle used in mine short distance transportation. Its working environment is bad, the bearing quality is large and empty, and the full load is alternately changed. The automatic transmission technology in heavy mine dump truck can reduce the labor intensity of drivers and improve the working efficiency of vehicles. At present, most of the shift strategies used in this kind of vehicles are based on the theory of automatic transmission of non-special vehicles, and the special working environment of mine dump trucks is not taken into account. The shift strategy therefore has some problems, such as insufficient power or cyclic shift, and so on. In this paper, according to the working environment and working characteristics of mining dump truck, a new parameter, vehicle load coefficient, is introduced to comprehensively characterize the vehicle load and road condition on the basis of the two-parameter automatic shift strategy of non-special vehicle. Finally, a three-parameter dynamic automatic shift strategy based on "speed, throttle opening and vehicle load coefficient" is proposed. In this paper, the 32 ton mine dump truck is taken as the research object. Firstly, the mathematical model of the vehicle transmission system, including the engine, the hydraulic torque converter and so on, is established, and the common work of the engine and the hydraulic torque converter is studied. The output characteristics of the two working together are solved. Then, the optimal shift speed is solved by analytical method and graphic method, and the shift curve of dynamic shift strategy is finally obtained. The simulation model of the whole vehicle transmission system is established in MATLAB/SIMULINK simulation environment, and the multi-working condition compound simulation test is carried out according to the shift strategy developed in this paper. The test results show that the shift strategy formulated in this paper can adapt to the bad environment of the vehicle and a variety of complex working conditions, can ensure the dynamic performance of the vehicle under various working conditions, and can reduce the setting of the automatic blocking mode of the vehicle. The test platform is built and tested in the equipment environment provided by a factory, and the improvement scheme of the test-bed for the automatic shift test is put forward, and the test control software and the automatic shift program are designed.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD562.1
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